Mouse code for the MacroRat
mbed-dev/targets/TARGET_NUVOTON/TARGET_NUC472/trng_api.c@46:b156ef445742, 2017-06-03 (annotated)
- Committer:
- sahilmgandhi
- Date:
- Sat Jun 03 00:22:44 2017 +0000
- Revision:
- 46:b156ef445742
- Parent:
- 18:6a4db94011d3
Final code for internal battlebot competition.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
sahilmgandhi | 18:6a4db94011d3 | 1 | /* |
sahilmgandhi | 18:6a4db94011d3 | 2 | * Hardware entropy collector for NUC472's RNGA |
sahilmgandhi | 18:6a4db94011d3 | 3 | * |
sahilmgandhi | 18:6a4db94011d3 | 4 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved |
sahilmgandhi | 18:6a4db94011d3 | 5 | * SPDX-License-Identifier: Apache-2.0 |
sahilmgandhi | 18:6a4db94011d3 | 6 | * |
sahilmgandhi | 18:6a4db94011d3 | 7 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
sahilmgandhi | 18:6a4db94011d3 | 8 | * not use this file except in compliance with the License. |
sahilmgandhi | 18:6a4db94011d3 | 9 | * You may obtain a copy of the License at |
sahilmgandhi | 18:6a4db94011d3 | 10 | * |
sahilmgandhi | 18:6a4db94011d3 | 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
sahilmgandhi | 18:6a4db94011d3 | 12 | * |
sahilmgandhi | 18:6a4db94011d3 | 13 | * Unless required by applicable law or agreed to in writing, software |
sahilmgandhi | 18:6a4db94011d3 | 14 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
sahilmgandhi | 18:6a4db94011d3 | 15 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
sahilmgandhi | 18:6a4db94011d3 | 16 | * See the License for the specific language governing permissions and |
sahilmgandhi | 18:6a4db94011d3 | 17 | * limitations under the License. |
sahilmgandhi | 18:6a4db94011d3 | 18 | * |
sahilmgandhi | 18:6a4db94011d3 | 19 | */ |
sahilmgandhi | 18:6a4db94011d3 | 20 | |
sahilmgandhi | 18:6a4db94011d3 | 21 | #if DEVICE_TRNG |
sahilmgandhi | 18:6a4db94011d3 | 22 | |
sahilmgandhi | 18:6a4db94011d3 | 23 | #include <stdlib.h> |
sahilmgandhi | 18:6a4db94011d3 | 24 | #include <string.h> |
sahilmgandhi | 18:6a4db94011d3 | 25 | #include "cmsis.h" |
sahilmgandhi | 18:6a4db94011d3 | 26 | #include "NUC472_442.h" |
sahilmgandhi | 18:6a4db94011d3 | 27 | #include "us_ticker_api.h" |
sahilmgandhi | 18:6a4db94011d3 | 28 | #include "trng_api.h" |
sahilmgandhi | 18:6a4db94011d3 | 29 | |
sahilmgandhi | 18:6a4db94011d3 | 30 | /* |
sahilmgandhi | 18:6a4db94011d3 | 31 | * Get Random number generator. |
sahilmgandhi | 18:6a4db94011d3 | 32 | */ |
sahilmgandhi | 18:6a4db94011d3 | 33 | static volatile int g_PRNG_done; |
sahilmgandhi | 18:6a4db94011d3 | 34 | volatile int g_AES_done; |
sahilmgandhi | 18:6a4db94011d3 | 35 | |
sahilmgandhi | 18:6a4db94011d3 | 36 | void CRYPTO_IRQHandler() |
sahilmgandhi | 18:6a4db94011d3 | 37 | { |
sahilmgandhi | 18:6a4db94011d3 | 38 | if (PRNG_GET_INT_FLAG()) { |
sahilmgandhi | 18:6a4db94011d3 | 39 | g_PRNG_done = 1; |
sahilmgandhi | 18:6a4db94011d3 | 40 | PRNG_CLR_INT_FLAG(); |
sahilmgandhi | 18:6a4db94011d3 | 41 | } else if (AES_GET_INT_FLAG()) { |
sahilmgandhi | 18:6a4db94011d3 | 42 | g_AES_done = 1; |
sahilmgandhi | 18:6a4db94011d3 | 43 | AES_CLR_INT_FLAG(); |
sahilmgandhi | 18:6a4db94011d3 | 44 | } |
sahilmgandhi | 18:6a4db94011d3 | 45 | } |
sahilmgandhi | 18:6a4db94011d3 | 46 | |
sahilmgandhi | 18:6a4db94011d3 | 47 | static void trng_get(unsigned char *pConversionData) |
sahilmgandhi | 18:6a4db94011d3 | 48 | { |
sahilmgandhi | 18:6a4db94011d3 | 49 | uint32_t *p32ConversionData; |
sahilmgandhi | 18:6a4db94011d3 | 50 | |
sahilmgandhi | 18:6a4db94011d3 | 51 | p32ConversionData = (uint32_t *)pConversionData; |
sahilmgandhi | 18:6a4db94011d3 | 52 | |
sahilmgandhi | 18:6a4db94011d3 | 53 | PRNG_Open(PRNG_KEY_SIZE_256, 1, us_ticker_read()); |
sahilmgandhi | 18:6a4db94011d3 | 54 | PRNG_Start(); |
sahilmgandhi | 18:6a4db94011d3 | 55 | while (!g_PRNG_done); |
sahilmgandhi | 18:6a4db94011d3 | 56 | |
sahilmgandhi | 18:6a4db94011d3 | 57 | PRNG_Read(p32ConversionData); |
sahilmgandhi | 18:6a4db94011d3 | 58 | } |
sahilmgandhi | 18:6a4db94011d3 | 59 | |
sahilmgandhi | 18:6a4db94011d3 | 60 | void trng_init(trng_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 61 | { |
sahilmgandhi | 18:6a4db94011d3 | 62 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 63 | /* Unlock protected registers */ |
sahilmgandhi | 18:6a4db94011d3 | 64 | SYS_UnlockReg(); |
sahilmgandhi | 18:6a4db94011d3 | 65 | /* Enable IP clock */ |
sahilmgandhi | 18:6a4db94011d3 | 66 | CLK_EnableModuleClock(CRPT_MODULE); |
sahilmgandhi | 18:6a4db94011d3 | 67 | |
sahilmgandhi | 18:6a4db94011d3 | 68 | /* Lock protected registers */ |
sahilmgandhi | 18:6a4db94011d3 | 69 | SYS_LockReg(); |
sahilmgandhi | 18:6a4db94011d3 | 70 | |
sahilmgandhi | 18:6a4db94011d3 | 71 | NVIC_EnableIRQ(CRPT_IRQn); |
sahilmgandhi | 18:6a4db94011d3 | 72 | PRNG_ENABLE_INT(); |
sahilmgandhi | 18:6a4db94011d3 | 73 | } |
sahilmgandhi | 18:6a4db94011d3 | 74 | |
sahilmgandhi | 18:6a4db94011d3 | 75 | void trng_free(trng_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 76 | { |
sahilmgandhi | 18:6a4db94011d3 | 77 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 78 | PRNG_DISABLE_INT(); |
sahilmgandhi | 18:6a4db94011d3 | 79 | NVIC_DisableIRQ(CRPT_IRQn); |
sahilmgandhi | 18:6a4db94011d3 | 80 | } |
sahilmgandhi | 18:6a4db94011d3 | 81 | |
sahilmgandhi | 18:6a4db94011d3 | 82 | int trng_get_bytes(trng_t *obj, uint8_t *output, size_t length, size_t *output_length) |
sahilmgandhi | 18:6a4db94011d3 | 83 | { |
sahilmgandhi | 18:6a4db94011d3 | 84 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 85 | |
sahilmgandhi | 18:6a4db94011d3 | 86 | *output_length = 0; |
sahilmgandhi | 18:6a4db94011d3 | 87 | if (length < 32) { |
sahilmgandhi | 18:6a4db94011d3 | 88 | unsigned char tmpBuff[32]; |
sahilmgandhi | 18:6a4db94011d3 | 89 | trng_get(tmpBuff); |
sahilmgandhi | 18:6a4db94011d3 | 90 | memcpy(output, &tmpBuff, length); |
sahilmgandhi | 18:6a4db94011d3 | 91 | *output_length = length; |
sahilmgandhi | 18:6a4db94011d3 | 92 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 93 | for (int i = 0; i < (length/32); i++) { |
sahilmgandhi | 18:6a4db94011d3 | 94 | trng_get(output); |
sahilmgandhi | 18:6a4db94011d3 | 95 | *output_length += 32; |
sahilmgandhi | 18:6a4db94011d3 | 96 | output += 32; |
sahilmgandhi | 18:6a4db94011d3 | 97 | } |
sahilmgandhi | 18:6a4db94011d3 | 98 | } |
sahilmgandhi | 18:6a4db94011d3 | 99 | |
sahilmgandhi | 18:6a4db94011d3 | 100 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 101 | } |
sahilmgandhi | 18:6a4db94011d3 | 102 | |
sahilmgandhi | 18:6a4db94011d3 | 103 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 104 |